Starting in the NW corner, it looked grim. No answers for a couple of minutes. 8dn was the FOI then it went clockwise from there until back to the NW where again it was slow. But it did fall out eventually.

13a STRIKE A LIGHT is an exclamation expressing surprise & thus a synonym of "Crikey".

22a, 6d I took the wordplay to be the 2nd of zinzan's alternatives. If it were the 1st, DA would presumably have simply clued "man" (= IAN), instead of "one man discovered". Also, "discovered" as an indicator to delete the initial letter is a standard device. Interpreting "discovered" as "sitting next to" strikes me as strained.